var ganttData = [
{
	id:1,
	name:'task 1',
	start : '2012-01-11',
	end: '2012-03-23',
	track:{
		completion:30
	}
},
{
	id:2,
	name:'task 2',
	start : "2012-02-11",
	end: "2012-03-23",
	relation : [{parent_task_id : 1, relation_type:'fs'}],
	track:{
		completion:30
	}
},
{
	id:3,
	name:'task 3',
	start : '2012-01-11',
	end: '2012-03-23',
	track:{
		completion:50
	}
},
{
	id:4,
	name:'task 4',
	start : '2012-04-11',
	end: '2012-10-23',
	relation : [{parent_task_id : 1, relation_type:'fs'},{parent_task_id : 3, relation_type:'fs'}],	
	track:{
		completion:20
	}
},
{
	id:5,
	name:'task 5',
	start : '2012-02-11',
	end: '2012-05-23',
	track:{
		completion:0
	}
}
];
/*
data format
{
	// task
	{	
		id : int
		name : string
		isMilestone : boolean
		prioirty :
		start : Date
		end : Date 
		note : string 
		attachment_link : [{}]
		relation : [{parent_task_id : int, relation_type:string(ff,fs,sf,ss)},]
		
		resources : 
			[
				{
					id : int
					name : string
					type : string(human, machine, etc)
					dayOff : [Date,]
					daily_work_hour : int // normally 8hr per day min 1hr - max 24hr
				}
			]
		
		track : 
			{
				completion : int // min 0, max 100
			}
	},
}
*/